The disk-usage alarm enable command enables the disk usage alarm function.
The undo disk-usage alarm enable command disables the disk usage alarm function.
By default, the disk usage alarm function is enabled.
In a scenario where the disk usage alarm function is enabled, when the disk usage reaches the alarm threshold, alarm ENTEXT_1.3.6.1.4.1.2011.5.25.31.2.0.21 hwEntityExtHardDiskFull is outputted; when the disk usage falls below the alarm threshold, alarm ENTEXT_1.3.6.1.4.1.2011.5.25.31.2.0.22 hwEntityExtHardDiskFullResume is outputted. You can run the disk-usage alarm threshold command to set the alarm threshold on the disk usage.